Don't make me link to that damn video again. It shows Windows 7, you know the desktop variety, recompiled to run on ARM.

Windows Phone 7 also runs on ARM.

You quite simply don't know what you're talking about. Years? They compiled that and said so in months. Better programmers... ok. No comment there.

But still... dude. You seriously haven't shown me that you know what you're talking about. Watch that boring video, watch MS show off Windows 7, talk about Windows 8 going ARM, and pay attention to how they're going to do it - and think about why.